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Kingsdown Twin High Profile Foundation

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SKU: 50283476

KINGSDOWN Quality Craftsman Since 1904. A blue and white mattress on a bed frame in a modern, well-lit bedroom.
Style + SUBSTANCE. Since 1904, Kingsdown has handcrafted mattresses in the US with superior materials and quality.
Handcrafted Excellence
Handcrafted Excellence

Handcrafted in the United States, our master artisans are committed to better sleep through exceptional craftsmanship.

Finest Materials
Finest Materials

Every square inch of a Kingsdown mattress is handcrafted with superior materials, not just the parts you can see and touch.

Tested and Certified
Tested and Certified

Every single mattress is tested and certified before it leaves our hands to ensure consistent quality and accurate support.

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Kingsdown

For over a century, the Kingsdown name has been synonymous with unprecedented quality. Every detail is considered, and we ensure superior material selection and perfection, right down to the last stitch of our renowned tailoring. Since 1904, we’ve never compromised on comfort, and neither should you.

You'll Love Kingsdown

Sleep Cooler
Sleep Cooler

Kingsdown mattresses are designed to help regulate temperature for cooler, more comfortable sleep.

Motion Isolation
Motion Isolation

Individually wrapped coils decrease motion transfer, and select models feature an added buffer that runs the length of the mattress to mitigate partner disturbance.

Highly Rated
Highly Rated

Kingsdown mattresses are highly rated with over 20,000 reviews, averaging 4.7 stars and a 96% referral rate.

Kingsdown foundations are meticulously hand assembled using sustainably sourced Canadian Spruce, which is exceptionally durable. Each piece of lumber is not only heat-treated, but kiln-dried, which improves the performance of the wood over time. Each wooden slat is placed more closely together and cut a full inch wider than most manufacturers to provide a sturdier base.

SKU: 50283476

Collection

Box Spring

Warranty

10 year limited warranty -

Code J -

View Warranty

Color

Black

Mattress foundation profile

High profile

Profile height

9 inch

Upholstery material

Fabric

Q&A answers generated with AI assistance.

Why is kiln-dried Canadian Spruce a superior material for a mattress base?

This foundation is built from sustainably sourced Canadian Spruce, a wood known for its exceptional durability. The lumber undergoes both heat-treatment and a kiln-drying process, which removes internal moisture. This is particularly beneficial in humid coastal or southern climates, as it prevents the wood from warping, cracking, or squeaking over time, ensuring a stable and silent sleep environment for years.


What is the benefit of a 9-inch "high profile" foundation?

A high-profile foundation, like this 9-inch model, is the standard height for traditional bedding. It is ideal for shoppers who prefer a classic, elevated look or for use with lower-profile bed frames. By adding significant height to the sleep surface, it makes getting in and out of bed easier for many adults while providing a commanding presence in the bedroom.


How does the construction of this foundation support my mattress warranty?

Many mattress warranties require a solid, non-yielding base with specific support requirements. This foundation is meticulously hand-assembled with wooden slats that are cut a full inch wider and placed closer together than industry standards. This creates a much sturdier, flatter surface that prevents the mattress from sagging or warping, helping you stay within your mattress manufacturer’s warranty guidelines.


Is a 9-inch foundation suitable for a child’s twin bed or a smaller apartment space?

When selecting a foundation for a child's room or a compact apartment, consider the total height of the bed. A 9-inch high-profile base provides a traditional look but will significantly raise the height of the mattress. For a younger child, you may want to measure the total height with the mattress to ensure they can climb in and out safely. For apartment dwellers, this foundation offers a robust support system in a standard twin footprint (75"l x 39"w), making it a durable choice for growing teens or guest rooms where space is at a premium.


Will this foundation work with modern memory foam or hybrid mattresses?

Yes. While traditional box springs with coils are often unsuitable for foam beds, this is a true foundation featuring a rigid wooden slat system. The increased surface area provided by the wider, closely-spaced slats makes it an excellent choice for memory foam, latex, and hybrid mattresses, which require consistent, flat support to maintain their structural integrity.


Is any assembly required for this twin mattress foundation?

No customer assembly is required. This unit is fully assembled at the factory to ensure maximum structural integrity and a squeak-free performance. Based on our delivery standards, our team handles the heavy lifting, so your foundation is ready for use immediately upon arrival.

39.00"w x 75.00"d x 9.00"h

4.4 out of 5 stars

Based on 813 ratings
5
76%
4
10%
3
4%
2
2%
1
8%
Mare

Love the product

This review was collected as part of a promotion

Beautiful

Review provided by Tempur-Pedic

Reviewed On Oct 14, 2026
Sir Sleepsalot

You get what you pay for

This review was collected as part of a promotion

Expensive, but a nice premium turnkey solution that keeps your mattress protected and ensures your warranty is good.

Review provided by Tempur-Pedic

Reviewed On Oct 13, 2026
sailor

sailor back

This review was collected as part of a promotion

helps with bed

Review provided by Tempur-Pedic

Reviewed On Oct 8, 2026
Comfy sleeper

Best nights sleep!

This review was collected as part of a promotion

Ultra low platform for our bed. It supports the bed perfectly and is the perfect height that we wanted.

Review provided by Tempur-Pedic

Reviewed On Oct 6, 2026
Marty

Perfect height

This review was collected as part of a promotion

I love a bed that is lower on the ground, so this is perfect.

Review provided by Tempur-Pedic

Reviewed On Oct 5, 2026